It creates file but when try open file, it prints an error, online browser xlxs viewer cannot open it too.
wb = XLSX.utils.book_new();
titles = ['title','second title'];
answers_list_ = ['answer', 'second answer'];
var ws_data = [
titles,
answers_list_
];
var ws_name = "SheetJS";
var ws = XLSX.utils.aoa_to_sheet(ws_data);
XLSX.utils.book_append_sheet(wb, ws, ws_name);
$("#button-a").click(function(e){
e.preventDefault();
XLSX.writeFile(wb, 'out.xlsx');
});